LED lamps and luminaires
An LED downlight lighting module is provided including an LED module having one or more single LEDs on a first printed circuit board, a heat sink, and a second printed circuit board. In an embodiment, the first printed circuit board is in good thermal contact with the heat sink such that heat from the LEDs is dissipated through the heat sink. In an embodiment, the second printed circuit board is adapted to accommodate a power and control circuitry for the LEDs, and is thermally insulated from the heat sink and from the first printed circuit board, and thus from the LED module. According to an aspect, the LEDs serve as the principal heat generating component on the printed circuit board, thus helping to increase the light output from the LEDs and/or increase the lifespan of the LED downlight lighting module.
1. An LED downlight lighting module comprising:
an LED module comprising one or more single LED(s) on a first printed circuit board;
a heat sink comprising a substantially hollow body, the substantially hollow body comprising a plurality of fins arranged within the substantially hollow body, wherein the substantially hollow body and the fins are formed from a material comprising a thermally conductive material and the first printed circuit board is in good thermal contact with the substantially hollow body such that heat from the LED(s) is dissipated through both the substantially hollow body and the fins; and
a second printed circuit board adapted to accommodate a power and control circuitry for the LED(s),
wherein the second printed circuit board is located within a driver box accommodated within one of a void and a recess in the substantially hollow body, and wherein the driver box is thermally insulated from the substantially hollow body of the heat sink and from the first printed circuit board, and thus from the LED(s), wherein the substantially hollow body takes the form of a substantially frustoconical shape closed at or near its narrower end by a rear wall having a front face and a rear face.
2. The LED downlight lighting module of claim 1 , wherein the second printed circuit board comprises a glass-reinforced epoxy laminate sheet.
3. The LED downlight lighting module of claim 1 , wherein the heat sink comprises aluminium.
4. The LED downlight lighting module of claim 1 , further comprising a lens.
5. The LED downlight lighting module of claim 4 , further comprising a lens cover.
6. The LED downlight lighting module of claim 1 , further comprising a lamp cap fitting.
7. The LED downlight lighting module of claim 6 , wherein the lamp cap fitting comprises a GU10 fitting.
8. The LED downlight lighting module of claim 7 , wherein the second printed circuit board is accommodated within the GU10 fitting.
9. The LED downlight lighting module of claim 1 , wherein the second printed circuit board further comprises a dimming circuitry for the LED(s).
10. The LED downlight lighting module of claim 1 , wherein at least one of the first printed circuit board and the second printed circuit board comprises a metal printed circuit board.